If it comes in from open hatches, tow eye, hull deck joint it may still settle to that point. I have a 1/4" hole drilled in the stern liner to drain into the lowest point but a 15 deg heel can put water into that little spot fast and it never returns but weeps and seeps.
The bolt pin you refer to is the pin-hige, you'll set free the 300# guillotine blade..I mean center board.